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MIC2778-2YM5 PDF预览

MIC2778-2YM5

更新时间： 2024-11-20 21:17:55
品牌 Logo 应用领域
美国微芯 - MICROCHIP 光电二极管
页数 文件大小 规格书
6页 169K
描述
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5

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中文翻译

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MIC2778-2YM5 技术参数

是否Rohs认证： 符合生命周期：Active
包装说明：LSSOP,Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.15可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G5
JESD-609代码：e3长度：2.9 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：5
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：LSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.45 mm最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：1.5 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：MATTE TIN
端子形式：GULL WING端子节距：0.95 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：1.6 mmBase Number Matches：1

MIC2778-2YM5 数据手册

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MIC2778  
Voltage Monitor with Adjustable Hysteresis  
General Description  
Features  
The MIC2778 is a voltage monitor—uniquely designed to  
detect two separate voltage thresholds—combined with a  
delay generator and logic. It is designed for monitoring the  
battery supply of portable digital systems, particularly PDAs,  
pagers, and cellular telephones.  
• Optimized for PDAs, cellular telephones, pagers,  
and other battery-powered devices  
• Independently adjustable high- and  
low-voltage thresholds  
• Internal logic prevents battery-voltage-fluctuation chatter  
• High ±2% voltage threshold accuracy; 1% available  
• Built in 140ms (minimum) delay deglitches output  
• Extremely low 1µA typical supply current  
• For applications not requiring built-in delay, see MIC841  
• Immune to brief power supply transients  
• 5-lead SOT-23 package  
High- and low-voltage thresholds can be adjusted inde-  
pendently, allowing for wide hysteresis. Voltage detection  
thresholds are accurate to 2%.  
If the battery voltage falls below the low-voltage threshold,  
the output (RST) is asserted and latched, preventing system  
operation until the battery is replaced or recharged. Internal  
logic prevents the output from chattering due to battery  
recovery or load removal. The output is asserted for 140ms  
(minimum) when a fresh battery is inserted. For applications  
not requiring built-in delay, see MIC841.  
Applications  
• PDAs  
• Pagers  
The IC’s power supply input is separate from the detector  
inputs, allowing the MIC2778 to be powered from a down-  
stream supply, such a boost converter. Supply current is  
extremely low (1µA, typical), making it ideal for portable  
applications.  
• Cordless phones  
• Consumer electronics  
• Embedded controllers  
• Personal electronics  
Ahigh-precision 1% grade is available. The MIC2778 is sup-  
plied in Micrel’s IttyBitty™ 5-lead SOT-23-5 package.  
Ordering Information  
Part Number  
Accurary  
Temperature Range  
Package  
Standard  
Marking  
Pb-Free  
Marking  
MIC2778-2BM5  
MIC2778-1BM5  
UFB  
UFA  
MIC2778-2YM5  
MIC2778-1YM5  
UFB*  
UFA*  
2%  
1%  
-40°C to +85°C  
-40°C to +85°C  
SOT-23-5  
SOT-23-5  
* Underscore indicates a Pb-Free part.  
Typical Application  
VOUT  
3.0V  
MIC5207-3.0BM5  
OUT  
BYP  
GND  
IN  
470pF  
4.7µF  
MIC2778  
Li-Ion  
Cell  
100k  
604k  
1%  
VDD  
LTH  
R ST  
EN  
56k  
1%  
HTH GND  
340k  
1%  
VBAT(hi) = 3.6V  
VBAT(lo) = 3.1V  
Cellular Telephone Battery Monitor  
IttyBitty™ is a trademark of Micrel, Inc.  
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-011405  
January 2005  
1
123456

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